Amazing Mirror & Air Experiment !

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Download the music in this video :
Song #1 : Over Rain
iTunes : https://itunes.apple.com/us/album/over-rain-single/id1033695238
Amazon : http://www.amazon.com/Over-Rain-brusspup/dp/B014JXPNSW/
Song #2 : Abyss - iTunes : https://itunes.apple.com/us/album/abyss-single/id1033702454
Amazon download : http://www.amazon.com/Abyss-brusspup/dp/B014I4BFTI/
This is a demonstration of the Schlieren effect. This setup allows you to see changes in air density. The point light source is aimed at the concave mirror. The concave mirror reflects to a focal point. There you use a sharp edged object to partially block the light which helps create a shadow effect that allows you to see air movement.
Big Thank you to :
Ruud Verdaasdonk
Ko van der Lubbe
Phil Koken
VUMC
and everyone else that helped with this project.
Other Schlieren videos to check out :
https://www.youtube.com/watch?v=mLp_rSBzteI
https://www.youtube.com/watch?v=gE9Omyg6gIE